Enhanced dissolved organic carbon production in aquatic ecosystems in response to elevated atmospheric CO2

2013 ◽  
Vol 118 (1-3) ◽  
pp. 49-60 ◽  
Author(s):  
Chao Song ◽  
Ford Ballantyne ◽  
Val H. Smith
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Aquatic Ecosystems ◽  
Atmospheric Co2 ◽  
Elevated Atmospheric Co2 ◽  
Carbon Production

Incorporation of local dissolved organic carbon into floodplain aquatic ecosystems

2021 ◽  
Author(s):  
Neil Saintilan ◽  
Jeffrey J. Kelleway ◽  
Debashish Mazumder ◽  
Tsuyoshi Kobayashi ◽  
Li Wen
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Aquatic Ecosystems

Phytoplankton extracellular dissolved organic carbon production in a hypertrophic African Lake

Hydrobiologia ◽  
1989 ◽  
Vol 182 (2) ◽  
pp. 137-148 ◽  
Author(s):  
Richard D. Robarts ◽  
Lynne M. Sephton
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Carbon Production ◽  
African Lake

Dissolved organic carbon production and runoff quality following peatland extraction and restoration

2011 ◽  
Vol 37 (12) ◽  
pp. 1998-2008 ◽  
Author(s):  
M. Strack ◽  
K. Tóth ◽  
R. Bourbonniere ◽  
J.M. Waddington
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Carbon Production ◽  
Runoff Quality

scholarly journals The role of watershed characteristics, permafrost thaw, and wildfire on dissolved organic carbon biodegradability and water chemistry in Arctic headwater streams

2015 ◽  
Vol 12 (5) ◽  
pp. 4021-4056 ◽  
Author(s):  
J. R. Larouche ◽  
B. W. Abbott ◽  
W. B. Bowden ◽  
J. B. Jones
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Aquatic Ecosystems ◽  
Vegetation Type ◽  
Watershed Scale ◽  
Ecosystem Recovery ◽  
Watershed Characteristics ◽  
Stream Geomorphology ◽  
Tundra Ecosystems

Abstract. In the Alaskan Arctic, rapid climate change is increasing the frequency of disturbance including wildfire and permafrost collapse. These pulse disturbances may influence the delivery of dissolved organic carbon (DOC) to aquatic ecosystems, however the magnitude of these effects compared to the natural background variability of DOC at the watershed scale is not well known. We measured DOC quantity, composition, and biodegradability from 14 river and stream reaches (watershed sizes ranging from 1.5–167 km2) some of which were impacted by permafrost collapse (thermokarst) and fire. We found that region had a significant impact on quantity and biodegradability of DOC, likely driven by landscape and watershed characteristics such as lithology, soil and vegetation type, elevation, and glacial age. However, contrary to our hypothesis, we found that streams disturbed by thermokarst and fire did not contain significantly altered labile DOC fractions compared to adjacent reference waters, potentially due to rapid ecosystem recovery after fire and thermokarst as well as the limited spatial extent of thermokarst. Overall, biodegradable DOC ranged from 4 to 46% and contrary to patterns of DOC biodegradability in large Arctic rivers, seasonal variation in DOC biodegradability showed no clear pattern between sites, potentially related to stream geomorphology and position along the river network. While thermokarst and fire can alter DOC quantity and biodegradability at the scale of the feature, we conclude that tundra ecosystems are resilient to these types of disturbance.

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